Cooling a 5 x 5 tent.

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dogman11

Member
Hello all,
I am upgrading my 5x5 grow using a vertical (as opposed to a flat scrog) system using two bare bulb 600W HPS,1200W. So far the temps are way to high at 85F. The air feels relatively cool but the direct light does feel hot.

I have a 470CFM 6" exit fan and smaller intake assist fan. The highest fresh air intake temps will be 72F.

I see my options are:
AC. (can't do it monthly cost wise)
Vertical Duel Cool tube set up. (I would like to not loose lumens)
Larger fan! I like this option most.

Will an 8" 843CFM fan cool the area ? Any thoughts would be awesome!
Thanks!
 
Machiavelli_719

Machiavelli_719

Active Member
dogman11 said:
Hello all,
I am upgrading my 5x5 grow using a vertical (as opposed to a flat scrog) system using two bare bulb 600W HPS,1200W. So far the temps are way to high at 85F. The air feels relatively cool but the direct light does feel hot.

I have a 470CFM 6" exit fan and smaller intake assist fan. The highest fresh air intake temps will be 72F.

I see my options are:
AC. (can't do it monthly cost wise)
Vertical Duel Cool tube set up. (I would like to not loose lumens)
Larger fan! I like this option most.

Will an 8" 843CFM fan cool the area ? Any thoughts would be awesome!
Thanks!
Click to expand...
Do you have a box fan laying horizontal to the ground blowing up to your light bulb? If not this helps tremendously on cooling the bulb down and it's only 20 bucks. If that doest bring it down below 80 then a bigger fan to exhaust, and use your 6 in fan you use for exhaust as your intake fan that should fix it.


-Machiavelli
 
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dogman11

Member
Thanks for the response! I do have a powerful fan directly below the lights. Thinking about a larger exhaust fan:
My 470cfm fan changes the air aprox 3 times a minute. An 850 cfm fan will change the air 5 times a minute. Will this difference make that much difference in temps? Right now the inside/out difference is 13 degrees -not good.
6 or 7 would be optimal. Hmmm..
 
Machiavelli_719

Machiavelli_719

Active Member
dogman11 said:
Thanks for the response! I do have a powerful fan directly below the lights. Thinking about a larger exhaust fan:
My 470cfm fan changes the air aprox 3 times a minute. An 850 cfm fan will change the air 5 times a minute. Will this difference make that much difference in temps? Right now the inside/out difference is 13 degrees -not good.
6 or 7 would be optimal. Hmmm..
Click to expand...
Do you run lights at night? If so is the exhaust running outside and intake coming from outside?
 
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dogman11

Member
Right now the lights are on at night. Next session, when the days are cooler I will switch this. Yes I pull air from the outside where it's coolest, also exhausting outside. Thanks!
 
Machiavelli_719

Machiavelli_719

Active Member
dogman11 said:
Right now the lights are on at night. Next session, when the days are cooler I will switch this. Yes I pull air from the outside where it's coolest, also exhausting outside. Thanks!
Click to expand...
I think your only real options are a bigger fan or try to cool the room the tent is in.
 
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